From: David Howells <dhowells@redhat.com>
To: syzbot <syzbot+3c74b1f0c372e98efc32@syzkaller.appspotmail.com>
Cc: dhowells@redhat.com, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, netfs@lists.linux.dev,
pc@manguebit.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [netfs?] KASAN: slab-use-after-free Read in netfs_unbuffered_write
Date: Wed, 24 Jun 2026 12:04:40 +0100 [thread overview]
Message-ID: <2961584.1782299080@warthog.procyon.org.uk> (raw)
In-Reply-To: <6a19f098.abb04025.19af7b.0003.GAE@google.com>
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 8fde5d1d47f6
diff --git a/fs/netfs/direct_write.c b/fs/netfs/direct_write.c
index 25f8ceb15fad..1ff1789016b8 100644
--- a/fs/netfs/direct_write.c
+++ b/fs/netfs/direct_write.c
@@ -190,12 +190,6 @@ static int netfs_unbuffered_write(struct netfs_io_request *wreq)
stream->prepare_write(subreq);
__set_bit(NETFS_SREQ_IN_PROGRESS, &subreq->flags);
netfs_stat(&netfs_n_wh_retry_write_subreq);
- } else {
- struct iov_iter source;
-
- netfs_reset_iter(subreq);
- source = subreq->io_iter;
- netfs_reissue_write(stream, subreq, &source);
}
}
next prev parent reply other threads:[~2026-06-24 11:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-29 20:01 [syzbot] [netfs?] KASAN: slab-use-after-free Read in netfs_unbuffered_write syzbot
2026-06-24 11:04 ` David Howells [this message]
2026-06-24 11:35 ` syzbot
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